Diffraction pattern by a Ronchi grating

Diffraction pattern by a Ronchi grating

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Caption: Diffraction pattern. Diffraction pattern formed by a Ronchi grating used to test telescope lenses or mirrors. Though the image here is well- corrected, flawed lenses or mirrors will distort the pattern. The Ronchi grating is used by shining light through it into the telescope, the resulting pattern being viewed through the eyepiece. Image from a 40 centimetre (16 inch) mirror telescope.

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Keywords: diffraction, diffraction pattern, grating, light, optics, physics, ronchi, ronchi gratin, ronchi grating, telescop, telescope test, testing

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